Heat-utilizing apparatus



9 3 5 7 .1 E D U m S s A M A L .J

Nov. 27, 1923.

' HEAT UTILIZING APPARATUS Filed Nov. 5', 1919 lr v/ //////l (/l/ll l/ K w/// I Fatented Net. 2?,

JEAN LAI IASSZKZ UDE, F LTMGGES,

intense nnnr-Uri niizrne arrenarus.

Application filed. November 3, 1919. Serial No. $35,49i.

To 0:73 whomz'zf may concern.

Be-it lrno'wn that T, JEAN Larmssmu'nn, a citizen of the French Republic, residing at 33 Avenue de Juillet, Limoges, France, have 6 invented certain new and useful Improvements in Heat-Utilizing Apparatuses, of which the following is a specification.

One knows that, according to the principles of physics, the quantityof heat radi 10 ated by a surface maintained at a constant temperature and exposed to the air depends on the area of that surface, on its shape,on its temperature and on the temperature of the air. On the other hand the emission of that heat takes place:

1. Through conductibility or convection; 2. Through radiation. This invention relates to improvements to the construction of autoclaves and other similar apparatuses utilizing steam or any other source of heat in order to increase their caloric yield by decreasing considerably the quantity of heat lost and transmitted to the ambient air by the envelop of these ap- 2 paratuses;

To that eiiect, in order to do away with the transmission through conductibility a vacuum envelop or chamber is interposed between the container utilizing the source of heat and the air. In that chamber is disposed a series of parallel plates, of small radiatin ower. in order bO decrease the.

clave or drying cylinder and having its lower endresting on an angle iron 0 fixed on the case b. V

The exterior envelop is fixed at its upper end to the circular closing member (Z and tight joints, interposed at the points of fixation of the envelop, allow the maintenance of a vacuum in the chamber 6 between the 5 case I) and the exterior envelop and at the same time permit the latter to follow the dilations of the case b. The apparatus is completed by one or more parallel concentric metallic plates 7, of small radiating power, arranged in the vacuum chamber 6 and fixed to the outer wall a of the latter by v i suppressed by thevacuum chambers around means of'boltsf, so that no contact exists between them. The plate f is also main tained out 03": contactfwith the case-b and the flanges 0 and d. I

This device applies to all autoclaves and particularly to those utilized in the vulcanization of rubber, the bleaching of paper pulp, the baking of the silicocalcareous bricks, etc.

The application of the device to the bottoms of autoclaves or drying cylinders,consists of a plate 9 fixed upon the bottom it andextending by a nozzle g through the trunnion 72, of the bottom it so as to form an inlet for the heat'and an outlet for the condensed waters.

The plate 9 and its nozzle g areso dis-' posed as to form vacuum chambers one of which j enclosed between the nozzle 9 and the trunnion h 'communicates. through an aperture is with the other chamber Zbetween the plate 9 and the bottom it.

Inside of the chamber Z is disposed a variable number of parallel plates m of small radiating-power, isolated from each other and without any contact with the plate 9 or the brim oi the bottom It.

This device applies to all drying cylinders generally speaking and particularly to those used for paper'making or for cloth drying.

It the admittance of heat and the evacuation of the condensed waters take place at the same end of the cylinder, the nozzle 9 of the plate g is done away with and the end of the trunnion 70 is hermetrically sealed so as to keep the vacuum in the chambers j and Z. v

It may be realized from the above description that this device thus constituted ensures an increase of the caloricy-ield of the apparatus to which it is applied, the transmission through oonductibility being the case and theheat radiated through those chambers being decreased. by the parallel plates disposed in said chambers.

It is to be well understood that this illustration of said invention is given only as an instance and that the shapes, details of construction, materials and dimensions may vary as the case may be, without departing from. the principle of the invention.

What I claim is s.

1. The combination with a receptacle hav ing a vacuum chamber arranged on its ax terior, of a metallic plate of small radiating power forming a parathermic screen which is supported only by the outer wall of the vacuum chamber at a fixed distance from the latter and spaced from the outer wall of the receptacle, the space between the plate and outer wall of the receptacle being unobstructed.

2. A combinationof the kind defined by claim 1 in which the vacuum chamber surrounds the receptacle and in which the metallic plate is concentric with the wall 0t said receptacle.

3., A combination as claimed in claim 1 including an additional vacuum chamber arranged at the bottom of said receptacle, and a metallic plate also arranged at the bottom of the receptcle within said last mentioned'chamber.

at. The combination with a receptacle, of a vacuum chamber arranged on the exterior of saidreceptacle, and a metallic plate supported only by the outer wall of said vacuum chamber and spaced away from the outer wall of the receptacle, the outer wall of the vacuum chamber and the top and bottom Walls of said chamber, the space betweenthe metallic plate and the outer wall of the receptacle being unobstructed.

bers located between the walls of a heat in- The arrangement within vacuum cha msulating device, of means to form parather- H110 screens, said means comprising metallic plates of slight emissive power arranged parallel to the walls of the vacuum chamber, equally distributed in depth over the space separating the said walls of the vacu v tacle, a vacuum chamber arranged between said receptacle and wall, and a parathermic screen of low radlatmg power arranged within said chamber, supported by said wall 7 only and spaced from the receptacle, said last mentioned space being unobstructed.

In testimony whereof I affix m signature.

JEAN LAMAS- IAUDE. 

